Boat-davit.



A. E. FREEMAN.

BOAT DAVIT.

APPLICATION FILED JULY 30. 1917.

1,292,294. Patented Jan. 21, 1919.

2 SHEETS-SHEET Inventor.

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A. E. FREEMAN.

BOAT DAVIT.

APPLICATION FILED JULY 30.1911.

1,292,294. Patented Jan. 21,1919.

2 SHEETS-SHEET 2.

Inentor.

ARTHUR E. FREEMAN, 0F TORONTO, ONTARIO, CANADA.

BOAT-DAVIT.

Specification of Letters Patent. I

Patented Jan. 21, 1919.

Application filed July 30, 1917. Serial No. 183,388.

To all whom it may concern:

Be it known that I, ARTHUR E. FREEMAN, a citizen of the United States of America, and resident of the city of Toronto, county of York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Boat-Davits, described in the following specification and illustrated in the accompanying drawings, that form part of the same.

The principal objects of the invention are to devise a davit for handling ships boats which may be operated with great ease and safety and which will give the maximum outreach and, further, to devise a davit which will lift the boat clear of the chocks and carry the boat well over the rail of the ship.

A further object is to devise a construction of davit which will be extremely simple to manufacture.

The principal feature of the present invention consists in pivotally supporting the davit boom to rotate about an axis which is divergent from the axis of the boom and providing means for rotating said boom.

Figure 1 is an elevational view taken from the inboard side of the davit showing the boom in the inboard position.

Fig. 2 is a side elevational view showing the boom in the outboard posit-ion in full lines and in the inboard position in dotted lines.

Fig. 3 is a top plan view showing the boom in the outboard position.

Fig. 4 is an elevation view from the. outboard side showing the boom in an intermediate position.

In the handling of ships boats it is desirable that the davit should lift the boat clear of the chocks and carry the boat outboard to clear the rail of the ship and swing it out as far as possible from the ships side while maintaining rigidity in the boom. In order to accomplish this and other desirable conditions of operation I have devised a structure in which the frame 1 is formed of a rigid structure having a step journal 2 formed in the base adjacent to the outboard side. This journal is arranged at one side of the frame.

The upper part of the frame is formed with a cross bar 3 in which is formed a journal 4E. The axis of the journal 4 is in alinement With the axis of the journal 2 and said axis is substantially perpendicular in respect to the inboard and outboard direction, but is arranged offset from the perpendicular in a fore and aft direction. The davit boom 5 is formed with a stud 6 upon its lower end which extends into the step journal 2 and the boom extends upwardly in an inclined direction, the axis being in acute angular relationship to the axis of the journals 2 and 4. An arm 7 is rigidly secured to the boom intermediate of its length having a sleeve 8 surrounding said boom and securely bolted thereto and said arm extends over the cross bar 3 of the frame and is provided with a journal pin 9 which extends into the journal 4. The boom is thus supported upon an axis which is divergent from the axis of the boom and both axes are preferably off the perpendicular in a fore and aft direction.

The arm 7 is secured to or forms part of a quadrantal gear 10 which extends over the top of the frame the teeth of said gear meshing with a worm 11 which is journaled in the transversely arranged bearings 12 and 13. arranged upon the inboard side of theframe 1.

The worm shaft 11 is provided with a suitable wheel or crank 14: for rotating same and it will be noted that the worm extends laterally in respect to the path of movement of the boom so that the operator will be removed from proximity to the boat which is being handled and consequently the swinging of the boat upon the falls will not interfere with proper operation of the davit. This is a very important feature in the matter of getting a boat overboard in stormy weather.

The frame is provided with a cleat or gipsy head to which the live end of the falls is temporarily secured while the boat is being swung outboard.

In the operation of this davit when the boom is swung to its innermost position the axis of the boom is in an oblique position, slanting inboard and slightly toward the boat so that the falls have a slight inward rake from the ends of the boat. Upon the operation of the screw spindle the gear 10 is rotated upon its axis and swings the arm 7, rotating the boom upon the axis of the journals 2 and 4: so that the upper end of the boom moves in a curved path in an outboard direction and as the boom swings from its inboard slant to a position where it assumes a perpendicular relation with the deck in a.

fore and aft direction, the boom head is carried in an upward curve thereby efiecting a lifting action which clears the boat from the chocks and raises the same, so that it will clear the rail of the ship.

In addition to the lifting caused by the slight raising of the boom head from its change of position, the rotating of the boom head away from the inboard side of the frame causes a lengthening of the distance between the falls gear nd the means for be laying the live end of the falls, consequently there is a slight pulling action upon the falls preferably offset from the perpendicular in a fore and aft direction so that as the boom is rotated outboard it assumes the position nearer to the perpendicular and achieves the lifting effect described.

The parts are extremely simple in their construction, are easily assembled and are simple and efiective in operation and there is nothing in the working mechanism which can be easily damaged or which will be detrimentally effected by ice or snow incrusting thereon,

What I claim as my invention is l. A boat davit having the boom pivotally supported from a fixed axis which diverges at an acute angle from the perpendicular, the boom diverging from said axis at an acute angle in the opposite side from the perpendicular, and means operatively connected with the boom intermediate of its length for swinging said boom about said fixed axis.

2. A boat davit having a boom pivotally supported at its lower end, a member rotatable upon an axis arranged in alinement with the pivotal axis of the lower end of the boom, the said rotatable member extending outwardly and supporting the boom intermediate of its length and retaining the boom in a position of angularity in respect to its.

axis of rotation.

3. A boat davit, comprising, a frame having a pair of journals arranged in axial ahnement one above the other, a boom pivotally supported in the lower journal and having its axis diverging from the axis of said journal, a member secured to said boom intermediate of its length and rotatably supported in the upper of said ournals and supporting the boom in angular relation to the axis of rotation, and means for rotating said supporting member.

a. A boat davit, comprising, a frame, a boom journaled at its lower end in said frame, an arm secured to said boom intermediate of its length and pivotally con nected to said frame in a bearing arranged in axial alinement with the bearing of the bottom of said boom, a gear segment connected to said arm, and a screw spindle journaled in said frame and operatively engaging the teeth of said gear segment to rotate same and effect the rotation of the boom.

5. In a boat davit, a frame having a pair of journals arranged adjacent to its outer side and in axial alinement, a boom rotatably mounted in the lower of said journals, an arm rotatably mounted in the upper of said journals and fixedly secured to said boom intermediate of its length, a gear segment connected with said arm, a screw spindle rotatably supported transversely on said frame and engaging said gear segment, and means for rotating said spindle.

ARTHUR E. FREEMAN.

Copies of this patent may be obtained for five ccnis each, by addressing the "Commissioner of Patents, Washington, D. G. 

